I have never done this before so I apologize if I don\'t describe my issue good enough or don\'t use all the right syntax.
What I have on my website is an email form
IE8 is not loading your form_validation.js
file and that's why it isn't running your initialization code in that file.
You need to change the type on your script tag to type="text/javascript"
or remove the type entirely. You have type="application/javascript"
which is not correct.
After further exploration, see Why doesn't IE8 recognize type="application/javascript" in a script tag? for more discussion.